package cn.tedu.stage2.thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/*
 * 线程池是线程的管理机制，主要解决两个方面的问题
 * 1.控制线程的数量
 * 2.重用线程
 */
public class ThreadPoolDemo {
    public static void main(String[] args) {
        // 创建一个2线程的线程池
        ExecutorService threadPool = Executors.newFixedThreadPool(2);
        for (int i=0;i<5;i++) {
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    Thread t = Thread.currentThread();
                    System.out.println(t.getName()+"正在执行任务。");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(t.getName()+"执行任务完毕！");
                }
            };
            // 将任务指派给线程池
            threadPool.execute(runnable);
        }
    }
}
